Load libraries & functions

root.dir <- "~/OneDrive/projects/"
project.dir <- paste0(root.dir,"PDX/")
source(paste0(root.dir,"R.utils/RNASEQ.utils.R"))
source(paste0(project.dir,"src/load.PDX.R"))
library(iC10)
library(genefu)
library(preprocessCore)
ensembl.human = useEnsembl(biomart="ensembl", dataset="hsapiens_gene_ensembl", GRCh=37)
ensembl.mouse = useEnsembl(biomart="ensembl", dataset="mmusculus_gene_ensembl")

Load PDX data

rnaseq <- get.PDX()
|--------------------------------------------------|
|==================================================|
meta <- load.meta()
meta <- subset.meta(meta,meta[,project=="characterisation"])
rnaseq <- subset.PDX(rnaseq, rnaseq$meta[,Sample.name] %in% meta[,Sample.name])
rnaseq$meta[Sample.name=="AB793-T1-T" & Pool=="SLX-12501",Sample.name:=paste0(Sample.name,".R2")]
meta <- rbind(meta,meta[Sample.name=="AB793-T1-T"])
meta[nrow(meta),Sample.name:=paste0(Sample.name,".R2")]
rnaseq <- merge.PDX(rnaseq)
#rnaseq$meta[,merged.lanes:=as.numeric(as.factor(merged.lanes))]
rnaseq$meta <- merge(rnaseq$meta,meta,sort=F)
rnaseq <- subset.PDX(rnaseq, rnaseq$meta[,human.library.size > 1e6])
rnaseq <- subset.PDX(rnaseq, rnaseq$meta[,mouse.library.size/(human.library.size+mouse.library.size) < .8])
rnaseq <- subset.PDX(rnaseq, rnaseq$meta[,sample.type!="cell.line"])

PCAs

pca.human <- pca.run(rnaseq$human$data)
ggpairs(cbind(pca.human,rnaseq$meta),columns = 1:3,mapping = aes(color=factor(merged.lanes)),title="Coloured by sequencing runs")

ggpairs(cbind(pca.human,rnaseq$meta),columns = 1:3,mapping = aes(color=factor(sample.type)),title="Coloured by sample type")

ggpairs(cbind(pca.human,rnaseq$meta),columns = 1:3,mapping = aes(color=cut(mouse.library.size/(human.library.size+mouse.library.size),quantile(mouse.library.size/(human.library.size+mouse.library.size)))),title="Coloured by mouse fraction")

x <- cbind(pca.human,rnaseq$meta)
x[sample.type=="xenograft" & PC1>-2 & PC2>5,.(Sample.name,merged.lanes,PC1)]
                  Sample.name                                    merged.lanes       PC1
 1:  AB642-M1-X01-00.020706-T                         SLX-12501:HFV2VBBXX:s_5 19.830498
 2:  AB613-M1-X01-00.011825-T                         SLX-12501:HFV2VBBXX:s_5 23.837450
 3: NKI250-T1-X01-00.018782-T                         SLX-12501:HFV2VBBXX:s_5 18.600173
 4: NKI250-T1-X00-00.037109-T                         SLX-12501:HFV2VBBXX:s_5 14.859144
 5: NKI336-M1-X01-00.024208-T SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7  5.181548
 6:  AB702-M1-X00-14.030064-T SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7 20.228967
 7: NKI302-T1-X00-00.035209-T SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7 18.302795
 8:  AB613-M1-X00-00.002369-T SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7 25.709310
 9: NKI302-T1-X01-00.022813-T SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7 14.336896
10:  AB635-T1-X00-00.000000-T SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7  5.811192
11:  AB405-T1-X00-00.022964-T SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7 21.278972
x[sample.type=="primary" & PC1< -2 & PC2>5,.(Sample.name,merged.lanes,PC1)]
    Sample.name                                    merged.lanes       PC1
 1:  AB790-T1-T                         SLX-12501:HFV2VBBXX:s_5 -11.89318
 2:  AB642-M1-T SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7 -17.43823
 3:  AB692-M1-T SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7 -18.37213
 4:  AB692-T1-T SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7 -19.14371
 5:  AB786-T1-T SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7 -10.39128
 6:  AB641-T1-T SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7 -15.77172
 7:  AB638-T1-T SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7 -16.80436
 8:  AB725-T1-T SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7 -18.10548
 9:  AB612-T1-T SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7 -15.80014
10:  AB710-T1-T SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7 -18.29053
11:  AB694-T1-T SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7 -17.90930
(y <- x[merged.lanes %in% c("SLX-12501:HFV2VBBXX:s_5"),.(Sample.name,sample.type,primary.on.pca=PC1>-2,PC1)])
                  Sample.name sample.type primary.on.pca        PC1
 1:  AB590-T1-X00-00.000000-T   xenograft          FALSE  -9.159861
 2:                AB636-M1-T     primary           TRUE  26.548445
 3:             AB793-T1-T.R2     primary           TRUE  17.677395
 4:  AB642-M1-X01-00.020706-T   xenograft           TRUE  19.830498
 5:  AB613-M1-X01-00.011825-T   xenograft           TRUE  23.837450
 6: NKI250-T1-X01-00.018782-T   xenograft           TRUE  18.600173
 7:                AB677-T1-T     primary           TRUE  25.136646
 8: NKI250-T1-X00-00.037109-T   xenograft           TRUE  14.859144
 9:                AB635-M1-T     primary           TRUE  23.079182
10:                AB693-T1-T     primary           TRUE   9.259491
11:                AB768-T1-T     primary           TRUE   5.820192
12:  AB694-T1-X00-00.027099-T   xenograft          FALSE  -8.685637
13:                AB790-T1-T     primary          FALSE -11.893180
14:                AB767-T1-T     primary           TRUE  12.480339
y[,.N,.(sample.type,primary.on.pca)]
   sample.type primary.on.pca N
1:   xenograft          FALSE 2
2:     primary           TRUE 7
3:   xenograft           TRUE 4
4:     primary          FALSE 1
(y <- x[merged.lanes %in% c("SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7"),.(Sample.name,sample.type,primary.on.pca=PC1>-2,PC1)])
                  Sample.name sample.type primary.on.pca         PC1
 1:  AB577-M1-X01-00.000000-T   xenograft          FALSE -19.8660467
 2: NKI336-T1-X00-00.035208-T   xenograft          FALSE -16.3855562
 3:                AB642-M1-T     primary          FALSE -17.4382318
 4:  AB636-M1-X00-00.000000-T   xenograft          FALSE -15.9302111
 5:                AB692-M1-T     primary          FALSE -18.3721287
 6:                AB692-T1-T     primary          FALSE -19.1437052
 7:                AB786-T1-T     primary          FALSE -10.3912754
 8:                AB641-T1-T     primary          FALSE -15.7717243
 9:                AB638-T1-T     primary          FALSE -16.8043639
10: NKI336-M1-X01-00.024208-T   xenograft           TRUE   5.1815485
11:                AB793-T1-T     primary           TRUE  13.6897316
12:                AB405-T1-T     primary           TRUE   7.5516926
13:  AB638-T1-X00-00.000000-T   xenograft          FALSE -15.2883010
14: NKI127-T1-X00-00.035207-T   xenograft          FALSE -18.8150188
15:                AB785-T1-T     primary           TRUE   0.1140427
16:                AB725-T1-T     primary          FALSE -18.1054783
17:                AB802-T1-T     primary           TRUE  14.5952252
18:                AB613-M1-T     primary           TRUE   8.5910833
19:                AB590-T1-T     primary           TRUE  24.7826696
20:  AB702-M1-X00-14.030064-T   xenograft           TRUE  20.2289670
21:                AB612-T1-T     primary          FALSE -15.8001431
22: NKI302-T1-X00-00.035209-T   xenograft           TRUE  18.3027953
23:                AB769-T1-T     primary           TRUE  21.8949170
24:                AB702-M1-T     primary           TRUE  24.2251866
25:  AB613-M1-X00-00.002369-T   xenograft           TRUE  25.7093101
26:                AB710-T1-T     primary          FALSE -18.2905334
27:                AB694-T1-T     primary          FALSE -17.9092967
28: NKI302-T1-X01-00.022813-T   xenograft           TRUE  14.3368963
29:  AB635-T1-X00-00.000000-T   xenograft           TRUE   5.8111919
30:  AB405-T1-X00-00.022964-T   xenograft           TRUE  21.2789715
                  Sample.name sample.type primary.on.pca         PC1
y[,.N,.(sample.type,primary.on.pca)]
   sample.type primary.on.pca  N
1:   xenograft          FALSE  5
2:     primary          FALSE 10
3:   xenograft           TRUE  7
4:     primary           TRUE  8

Remove bad(?) libraries & repeat PCA

rnaseq <- subset.PDX(rnaseq, rnaseq$meta[,!(merged.lanes %in% c("SLX-12501:HFV2VBBXX:s_5","SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7"))])
rnaseq$meta[,merged.lanes:=as.numeric(as.factor(merged.lanes))]
pca.human <- pca.run(rnaseq$human$data,rename = T)
pca.human <- cbind(pca.human,rnaseq$meta)
ggpairs(pca.human,columns = 1:3,mapping = aes(color=factor(merged.lanes)),title="Coloured by sequencing runs")

ggpairs(pca.human,columns = 1:3,mapping = aes(color=factor(sample.type)),title="Coloured by sample type")

ggpairs(pca.human,columns = 1:3,mapping = aes(color=ER_PAT),title="Coloured by ER_PAT status")

ggpairs(pca.human,columns = 1:3,mapping = aes(color=ER_IHC_PDX),title="Coloured by ER_IHC_PDX status")

We see that while some batch effect remains between the samples, the major drivers of variability is xenograft vs primary alongside ER status. For the latter of these, we see more seperation by ER in xenographs, though this could be due to the biased composition of the cohort.

for(stype in unique(rnaseq$meta$sample.type)){
  x <- subset.PDX(rnaseq,rnaseq$meta$sample.type == stype)
  pca.human <- pca.run(x$human$data,rename = T)
  pca.human <- cbind(pca.human,x$meta)
  print(ggpairs(pca.human,columns = 1:3,mapping = aes(color=factor(merged.lanes)),title=paste(stype,"Coloured by sequencing runs")))
  print(ggpairs(pca.human,columns = 1:3,mapping = aes(color=ER_PAT),title=paste(stype,"Coloured by ER_PAT status")))
  if(stype == "xenograft") print(ggpairs(pca.human,columns = 1:3,mapping = aes(color=ER_IHC_PDX),title=paste(stype,"Coloured by ER_IHC_PDX status")))
}

We still don’t see seperation by ER status in the primary samples when we analyse them independently of the xenografts. As to the xenograft samples, we see clearly the batch effect by (sequencing) run. We also see seperation due to ER status. Curriously, some samples do not cluster with the ER status they were found to have by IHC.

x <- subset.PDX(rnaseq,rnaseq$meta$sample.type == "xenograft")
pca.human <- pca.run(x$human$data,rename = T)
pca.human <- cbind(pca.human,x$meta)
pca.human[ER_PAT != "" & ER_IHC_PDX != "",sum(ER_PAT!=ER_IHC_PDX)/.N]
[1] 0.1702128
set.seed(1)
pca.human$er.pca <- as.factor(kmeans(pca.human[,1],2)$cluster)
levels(pca.human$er.pca) <- c("NEG","POS")
table(pca.human[ER_PAT != "",.(er.pca,ER_PAT)])
      ER_PAT
er.pca NEG POS
   NEG  49  13
   POS   4  29
table(pca.human[ER_IHC_PDX %in% c("POS","NEG"),.(er.pca,ER_IHC_PDX)])
      ER_IHC_PDX
er.pca NEG POS
   NEG  52   7
   POS   8  27

17% of samples change ER status according to IHC. 83% accuracy w.r.t IHC on patients. 86% accuracy w.r.t IHC on xenografts.

Unsuprisingly, the testing on xenografts works better, though an error rate greater than 10% is till concerning.

x <- subset.PDX(rnaseq,rnaseq$meta$sample.type == "xenograft")
pca.human <- pca.run(x$human$data)
set.seed(1)
x$meta$er.pca <- as.factor(kmeans(pca.human[,1],2)$cluster)
levels(x$meta$er.pca) <- c("NEG","POS")
y <- norm.count.matrix(x$human$data,lib.sizes = colSums(x$human$data))
x$meta$ER.exp <- y[which(rownames(y) == "ENSG00000091831"),]
x <- x$meta[,.(Sample.name,ER.exp,er.pca,ER_PAT,ER_IHC_PDX)]
x <- melt(x,id.vars = 1:2)
ggplot(x[value %in% c("NEG","POS")], aes(x=variable,y=ER.exp,colour=value)) + geom_boxplot() + geom_point() +theme_tufte()

ER expression does not exclusively drive the clustering, as we see many samples with low ER expression in the “NEG” cluster. However, it should be noted the samples that express ER differently to that found in ER_IHC_PDX.

print("False neg:")
[1] "False neg:"
x[variable=="ER_IHC_PDX" & value=="NEG"][order(-ER.exp)][1]
                  Sample.name   ER.exp   variable value
1: AB764-T1-P01-.35287-T1-FF1 7.041696 ER_IHC_PDX   NEG
print("False pos:")
[1] "False pos:"
x[variable=="ER_IHC_PDX" & value=="POS"][order(ER.exp)][1:2]
                      Sample.name     ER.exp   variable value
1:     AB892-T1-P00-.35365-T1-FF1 -0.2773063 ER_IHC_PDX   POS
2: CAM2004T2-T2-P01-.29055-T1-FF1 -0.2327316 ER_IHC_PDX   POS
x <- subset.PDX(rnaseq,rnaseq$meta$sample.type == "xenograft")
y <- pca.prep(x$human$data,T,1000,colSums(x$human$data))
y <- prcomp(t(y),scale=T)
pc1 <- y$rotation[,1]
pc1 <- data.table(ENSEMBL=names(pc1),value=pc1)
pc1 <- data.table(merge(biomaRt::select(org.Hs.eg.db,keys=pc1$ENSEMBL,keytype = "ENSEMBL",
                columns = c("ENSEMBL","ENTREZID","SYMBOL","GENENAME"),all.x=T),pc1))
'select()' returned 1:many mapping between keys and columns
pc1[order(-abs(value))][1:20,.(SYMBOL,GENENAME,value)]
      SYMBOL                                                      GENENAME       value
 1:     TFF3                                              trefoil factor 3  0.05844562
 2:   BCL11A               BAF chromatin remodeling complex subunit BCL11A -0.05802838
 3:     FBP1                                     fructose-bisphosphatase 1  0.05726330
 4:    CALD1                                                   caldesmon 1 -0.05686603
 5:     KRT5                                                     keratin 5 -0.05667319
 6:     TFF1                                              trefoil factor 1  0.05659660
 7:     CAV1                                                    caveolin 1 -0.05642500
 8:    MAML2                 mastermind like transcriptional coactivator 2 -0.05624191
 9:   ABCC11                    ATP binding cassette subfamily C member 11  0.05619574
10:    SFRP1                           secreted frizzled related protein 1 -0.05593166
11:    DZIP1                         DAZ interacting zinc finger protein 1 -0.05589324
12:     RHOH                                   ras homolog family member H  0.05560767
13:    BCAS1                         breast carcinoma amplified sequence 1  0.05541772
14:   B3GNT5 UDP-GlcNAc:betaGal beta-1,3-N-acetylglucosaminyltransferase 5 -0.05508903
15: SERPINB5                                      serpin family B member 5 -0.05453957
16:    FSCN1                               fascin actin-bundling protein 1 -0.05452831
17:     CAV2                                                    caveolin 2 -0.05430549
18:   GASK1B                                    golgi associated kinase 1B  0.05406583
19:     RGMA                 repulsive guidance molecule BMP co-receptor a -0.05401768
20:   PM20D2                             peptidase M20 domain containing 2 -0.05373181

No one marker gene dominates PC1. For reference, ESR1 has rank 88.

y <- norm.count.matrix(rnaseq$human$data,lib.sizes = colSums(rnaseq$human$data))
x <- cbind(rnaseq$meta,ER.exp = y[which(rownames(y) == "ENSG00000091831"),])
ggplot(x,aes(x=sample.type,y=ER.exp,color=factor(kmeans(x$ER.exp,2)$cluster))) + geom_jitter(width=.2)

Kmeans method can be expanded to include promary samples.

Summary: - Batch effect due to sequencing to correct. - Xenograft/Primary and ER.status drives variability.

Derive genotype thresholds

ER

x <- log(calculate_tpm(rnaseq$human$data,rnaseq$human$gene.meta$Length)+0.5)
y <- cbind(rnaseq$meta,ER.exp=x[which(rownames(x) == "ENSG00000091831"),])
ggplot(y) + aes(x=reorder(Sample.name,ER.exp),y=ER.exp,color=ER_IHC_PDX) + geom_point() + facet_grid(sample.type~merged.lanes) + theme(axis.text.x = element_blank())

ggplot(y) + aes(x=reorder(Sample.name,ER.exp),y=ER.exp,color=ER_PAT) + geom_point() + facet_grid(sample.type~merged.lanes) + theme(axis.text.x = element_blank())

Ideally we would do the assignment of pos/neg within lanes, but that isn’t possible due to some lanes containing only POS.

library(pROC)
x <- log(calculate_tpm(rnaseq$human$data,rnaseq$human$gene.meta$Length)+0.5)
y <- cbind(rnaseq$meta,ER.exp=x[which(rownames(x) == "ENSG00000091831"),])
roc.pdx <- y[ER_IHC_PDX %in% c("POS","NEG") & sample.type=="xenograft",roc(ER_IHC_PDX,ER.exp)]
Setting levels: control = NEG, case = POS
Setting direction: controls < cases
plot(roc.pdx)

(er.thresh.pdx <- data.table(t(coords(roc.pdx,"all",ret=c("threshold","accuracy"))))[which.max(accuracy),threshold])
An upcoming version of pROC will set the 'transpose' argument to FALSE by default. Set transpose = TRUE explicitly to keep the current behavior, or transpose = FALSE to adopt the new one and silence this warning. Type help(coords_transpose) for additional information.
[1] 3.168585
roc.pri <- y[ER_PAT %in% c("POS","NEG") & sample.type=="primary",roc(ER_PAT,ER.exp)]
Setting levels: control = NEG, case = POS
Setting direction: controls < cases
plot(roc.pri)

(er.thresh.pri <- data.table(t(coords(roc.pri,"all",ret=c("threshold","accuracy"))))[which.max(accuracy),threshold])
An upcoming version of pROC will set the 'transpose' argument to FALSE by default. Set transpose = TRUE explicitly to keep the current behavior, or transpose = FALSE to adopt the new one and silence this warning. Type help(coords_transpose) for additional information.
[1] 0.7195949
ggplot(y) + aes(x=reorder(Sample.name,ER.exp),y=ER.exp,color=ER_IHC_PDX) + geom_point() + facet_grid(sample.type~merged.lanes) + theme(axis.text.x = element_blank()) + geom_hline(aes(yintercept=er.thresh.pdx))

ggplot(y) + aes(x=reorder(Sample.name,ER.exp),y=ER.exp,color=ER_PAT) + geom_point() + facet_grid(sample.type~merged.lanes) + theme(axis.text.x = element_blank()) + geom_hline(aes(yintercept=er.thresh.pri))

y[,er.inferred:=ifelse(sample.type=="xenograft", ifelse(ER.exp>er.thresh.pdx,"POS","NEG"), ifelse(ER.exp>er.thresh.pri,"POS","NEG"))]
ggplot(y) + aes(x=reorder(Sample.name,ER.exp),y=ER.exp,color=er.inferred) + geom_point() + facet_grid(sample.type~merged.lanes) + theme(axis.text.x = element_blank())

rnaseq$meta$er.inferred <- y$er.inferred

HER2

x <- log(calculate_tpm(rnaseq$human$data,rnaseq$human$gene.meta$Length)+0.5)
y <- cbind(rnaseq$meta,HER2.exp=x[which(rownames(x) == "ENSG00000141736"),])
ggplot(y) + aes(x=reorder(Sample.name,HER2.exp),y=HER2.exp,color=HER2_PDX) + geom_point() + facet_grid(sample.type~merged.lanes) + theme(axis.text.x = element_blank())

ggplot(y) + aes(x=reorder(Sample.name,HER2.exp),y=HER2.exp,color=HER2_PAT) + geom_point() + facet_grid(sample.type~merged.lanes) + theme(axis.text.x = element_blank())

Ideally we would do the assignment of pos/neg within lanes, but that isn’t possible due to some lanes containing only POS.

library(pROC)
roc.pdx <- y[HER2_PDX %in% c("POS","NEG") & sample.type=="xenograft",roc(HER2_PDX,HER2.exp)]
Setting levels: control = NEG, case = POS
Setting direction: controls < cases
plot(roc.pdx)

(HER2.thresh.pdx <- data.table(t(coords(roc.pdx,"all",ret=c("threshold","accuracy"))))[which.max(accuracy),threshold])
An upcoming version of pROC will set the 'transpose' argument to FALSE by default. Set transpose = TRUE explicitly to keep the current behavior, or transpose = FALSE to adopt the new one and silence this warning. Type help(coords_transpose) for additional information.
[1] 6.010892
roc.pri <- y[HER2_PAT %in% c("POS","NEG") & sample.type=="primary",roc(HER2_PAT,HER2.exp)]
Setting levels: control = NEG, case = POS
Setting direction: controls < cases
plot(roc.pri)

(HER2.thresh.pri <- data.table(t(coords(roc.pri,"all",ret=c("threshold","accuracy"))))[which.max(accuracy),threshold])
An upcoming version of pROC will set the 'transpose' argument to FALSE by default. Set transpose = TRUE explicitly to keep the current behavior, or transpose = FALSE to adopt the new one and silence this warning. Type help(coords_transpose) for additional information.
[1] 5.27486
ggplot(y) + aes(x=reorder(Sample.name,HER2.exp),y=HER2.exp,color=HER2_PDX) + geom_point() + facet_grid(sample.type~merged.lanes) + theme(axis.text.x = element_blank()) + geom_hline(aes(yintercept=HER2.thresh.pdx))

ggplot(y) + aes(x=reorder(Sample.name,HER2.exp),y=HER2.exp,color=HER2_PAT) + geom_point() + facet_grid(sample.type~merged.lanes) + theme(axis.text.x = element_blank()) + geom_hline(aes(yintercept=HER2.thresh.pri))

y[,HER2.inferred:=ifelse(sample.type=="xenograft", ifelse(HER2.exp>HER2.thresh.pdx,"POS","NEG"), ifelse(HER2.exp>HER2.thresh.pri,"POS","NEG"))]
ggplot(y) + aes(x=reorder(Sample.name,HER2.exp),y=HER2.exp,color=HER2.inferred) + geom_point() + facet_grid(sample.type~merged.lanes) + theme(axis.text.x = element_blank())

rnaseq$meta$HER2.inferred <- y$HER2.inferred

Batch correction on TPMs

Without batch correction

x <- log(calculate_tpm(rnaseq$human$data,rnaseq$human$gene.meta$Length)+0.5)
pca.human <- pca.run(x,normalise = F)
pca.human <- cbind(pca.human,rnaseq$meta)

ggpairs(pca.human,columns = 1:3,mapping = aes(color=factor(merged.lanes)),title="Coloured by sequencing runs")
ggpairs(pca.human,columns = 1:3,mapping = aes(color=factor(sample.type)),title="Coloured by sample type")
ggpairs(pca.human,columns = 1:3,mapping = aes(color=ER_PAT),title="Coloured by ER_PAT status")
ggpairs(pca.human,columns = 1:3,mapping = aes(color=ER_IHC_PDX),title="Coloured by ER_IHC_PDX status")

With batch correction

x <- log(calculate_tpm(rnaseq$human$data,rnaseq$human$gene.meta$Length)+0.5)
sequencing <- rnaseq$meta[,merged.lanes]
sample.type <- rnaseq$meta[,sample.type]
er.type <- rnaseq$meta$er.inferred
her2.type <- rnaseq$meta$HER2.inferred
d <- model.matrix(~ 0 + sample.type + er.type + her2.type)
x <-  removeBatchEffect(x,batch = sequencing,design = d)
pca.human <- pca.run(x,normalise = F,rename = T)
pca.human <- cbind(pca.human,rnaseq$meta)
ggpairs(pca.human,columns = 1:3,mapping = aes(color=factor(merged.lanes)),title="Coloured by sequencing runs")

ggpairs(pca.human,columns = 1:3,mapping = aes(color=factor(sample.type)),title="Coloured by sample type")

ggpairs(pca.human,columns = 1:3,mapping = aes(color=ER_PAT),title="Coloured by ER_PAT status")

ggpairs(pca.human,columns = 1:3,mapping = aes(color=ER_IHC_PDX),title="Coloured by ER_IHC_PDX status")

Calc. & Write TPMs

Default

keyMap <- data.table(getBM(
  attributes=c('mgi_symbol','ensembl_gene_id'),
  filters = 'ensembl_gene_id', 
  values = rownames(rnaseq.TPMs$mouse$TPMs.correct), 
  mart = ensembl.mouse
))

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i <- rnaseq$meta[,which(patient=="AB559")]
j <- rowSums(rnaseq.TPMs$human$TPMs.correct[,i]==0) != 2
quantile(apply(rnaseq.TPMs$human$TPMs.correct[j,i],1,diff))
         0%         25%         50%         75%        100% 
-3.19839173 -0.01725355  0.00000000  0.03110988  3.37223850 
cor(rnaseq.TPMs$human$TPMs.correct[,i])
                            AB559-T1-x01-00-001490-T-R1 AB559-T1-x01-00-001490-T-R2
AB559-T1-x01-00-001490-T-R1                   1.0000000                   0.9833126
AB559-T1-x01-00-001490-T-R2                   0.9833126                   1.0000000
boxplot(cor(rnaseq.TPMs$human$TPMs.correct))

fwrite(rnaseq.TPMs$meta,"~/Desktop/PDX.rnaseq.char.sample_meta.csv")
#fwrite(rnaseq.TPMs$human$humangene.meta,"~/Desktop/PDX.rnaseq.char.human.gene_meta.csv")
fwrite(as.data.table(rnaseq.TPMs$human$TPMs.correct,keep.rownames = "Geneid"),"~/Desktop/PDX.rnaseq.char.human.TPMs_corrected.csv")
#fwrite(as.data.table(rnaseq.TPMs$data.TPMs,keep.rownames = "Geneid"),"~/Desktop/PDX.rnaseq.char.mouse.TPMs.csv")
fwrite(as.data.table(rnaseq.TPMs$mouse$TPMs.correct,keep.rownames = "Geneid"),"~/Desktop/PDX.rnaseq.char.mouse.TPMs_corrected.csv")

Inc. mouse

x <- log(calculate_tpm(rnaseq$human$data,rnaseq$human$gene.meta$Length)+0.5)
set.seed(1); er.type <- kmeans(x[which(rownames(x) == "ENSG00000091831"),],2)$cluster
sequencing <- rnaseq$meta[,merged.lanes]
sample.type <- rnaseq$meta[,sample.type]
d <- model.matrix(~ 0 + sample.type + er.type)

rnaseq.TPMs <- list(
  meta = rnaseq$meta,
  human = list(
    gene.meta = rnaseq$human$gene.meta,
    TPMs = calculate_tpm(rnaseq$human$data,
                         rnaseq$human$gene.meta$Length,
                         ls=colSums(rnaseq$human$data) + colSums(rnaseq$mouse$data))
  ),
  mouse = list(
    gene.meta = rnaseq$mouse$gene.meta,
    TPMs = calculate_tpm(rnaseq$mouse$data,
                         rnaseq$mouse$gene.meta$Length,
                         ls=colSums(rnaseq$human$data) + colSums(rnaseq$mouse$data))
  )
)

rnaseq.TPMs$human$TPMs.correct <- removeBatchEffect(log(rnaseq.TPMs$human$TPMs+0.5),batch = sequencing,design = d)
rnaseq.TPMs$mouse$TPMs.correct <- removeBatchEffect(log(rnaseq.TPMs$mouse$TPMs+0.5),batch = sequencing,design = d)

keyMap <- data.table(getBM(
  attributes=c('hgnc_symbol','ensembl_gene_id'),
  filters = 'ensembl_gene_id', 
  values = rownames(rnaseq.TPMs$human$TPMs.correct), 
  mart = ensembl.human
))
rownames(rnaseq.TPMs$human$TPMs.correct) <- keyMap[match(rownames(rnaseq.TPMs$human$TPMs.correct),keyMap$ensembl_gene_id),]$hgnc_symbol
rnaseq.TPMs$human$TPMs.correct <- rnaseq.TPMs$human$TPMs.correct[rownames(rnaseq.TPMs$human$TPMs.correct) != "",]
rnaseq.TPMs$human$TPMs.correct <- rnaseq.TPMs$human$TPMs.correct[(rowSums(is.na(rnaseq.TPMs$human$TPMs.correct)) == 0),]

keyMap <- data.table(getBM(
  attributes=c('mgi_symbol','ensembl_gene_id'),
  filters = 'ensembl_gene_id', 
  values = rownames(rnaseq.TPMs$mouse$TPMs.correct), 
  mart = ensembl.mouse
))
rownames(rnaseq.TPMs$mouse$TPMs.correct) <- keyMap[match(rownames(rnaseq.TPMs$mouse$TPMs.correct),keyMap$ensembl_gene_id),]$mgi_symbol
rnaseq.TPMs$mouse$TPMs.correct <- rnaseq.TPMs$mouse$TPMs.correct[rownames(rnaseq.TPMs$mouse$TPMs.correct) != "",]
rnaseq.TPMs$mouse$TPMs.correct <- rnaseq.TPMs$mouse$TPMs.correct[(rowSums(is.na(rnaseq.TPMs$mouse$TPMs.correct)) == 0),]
#fwrite(rnaseq.TPMs$meta,"~/Desktop/PDX.rnaseq.char.sample_meta.csv")
#fwrite(rnaseq.TPMs$human$humangene.meta,"~/Desktop/PDX.rnaseq.char.human.gene_meta.csv")
fwrite(as.data.table(rnaseq.TPMs$human$TPMs.correct,keep.rownames = "Geneid"),"~/Desktop/PDX.rnaseq.char.human.TPMs_corrected_libsize.csv")
#fwrite(as.data.table(rnaseq.TPMs$data.TPMs,keep.rownames = "Geneid"),"~/Desktop/PDX.rnaseq.char.mouse.TPMs.csv")
fwrite(as.data.table(rnaseq.TPMs$mouse$TPMs.correct,keep.rownames = "Geneid"),"~/Desktop/PDX.rnaseq.char.mouse.TPMs_corrected_libsize.csv")

Combining with TCGA

Load TCGA data

fname <- paste0(root.dir,"tcga/data/rnaseq.RDS")
if(!file.exists(fname)){
  x <- lapply(list.dirs(paste0(root.dir,"tcga/data/rnaseq"),recursive = F),
              function(x) fread(cmd=paste("gzip -dc",list.files(x,pattern = "*.gz",full.names = T)[1]))
              )
  tcga <- as.matrix(do.call(cbind,lapply(x, function(y) y[,2])))
  rownames(tcga) <- tstrsplit(unlist(x[[1]][,1]),"\\.")[[1]]
  colnames(tcga) <- basename(list.dirs(paste0(root.dir,"tcga/data/rnaseq")))
  rm(x)
  saveRDS(tcga,fname)
}
tcga <- readRDS(fname)
fname <- paste0(root.dir,"tcga/data/rnaseq.meta.csv")
if(!file.exists(fname)){
  library(GenomicDataCommons)
  TCGAtranslateID = function(file_ids, legacy = FALSE) {
    info = files(legacy = legacy) %>%
        filter( ~ file_id %in% file_ids) %>%
        select('cases.samples.submitter_id') %>%
        results_all()
    
    id_list = lapply(info$cases,function(a) {
        a[[1]][[1]][[1]]})
    barcodes_per_file = sapply(id_list,length)
    
    return(data.frame(file_id = rep(ids(info),barcodes_per_file),
                    submitter_id = unlist(id_list)))
  }
  fnames <- basename(list.dirs(paste0(root.dir,"tcga/data/rnaseq"),recursive = F))
  tcga.meta <- data.table(TCGAtranslateID(fnames))
  tcga.meta <- tcga.meta[match(fnames,file_id)]
  tcga.meta[,bcr_patient_barcode:=substr(submitter_id,0,12)]
  
  clinical <- fread(paste0(root.dir,"tcga/data/clincal_meta_brca.txt"),skip = 1)
  tcga.meta <- merge(tcga.meta,clinical,all.x=T,sort=F)
  
  fwrite(tcga.meta,fname)
}
tcga.meta <- fread(fname)

PCA (TCGA only)

pca.human <- pca.run(tcga,normalise = T)
pca.human <- cbind(pca.human,tcga.meta)
ggpairs(pca.human,columns = 1:3,aes(colour=breast_carcinoma_estrogen_receptor_status))

##PCA (combined) w/ various normalisations

x <- log(calculate_tpm(rnaseq$human$data,rnaseq$human$gene.meta$Length)+0.5)
sequencing <- rnaseq$meta[,merged.lanes]
sample.type <- rnaseq$meta[,sample.type]
set.seed(1); er.type <- kmeans(x[which(rownames(x) == "ENSG00000091831"),],2)$cluster

i <- which(rowSums(rnaseq$human$data) != 0)
x <- rnaseq$human$data[i,]
x <- DGEList(x)
x <- calcNormFactors(x)
x <- voom(x,design = model.matrix(~ 0 + sample.type + er.type + sequencing))
x <- removeBatchEffect(x$E, batch=sequencing, design=model.matrix(~ 0 + sample.type + er.type))

i <- tcga.meta[,breast_carcinoma_estrogen_receptor_status %in% c("Negative","Positive")]
y <- DGEList(tcga[,i])
y <- calcNormFactors(y)
y <- voom(y, design = model.matrix(~ 0 + tcga.meta$breast_carcinoma_estrogen_receptor_status[i]))

x <- cbind(x,y$E[match(rownames(x),rownames(y)),])
rm(y)

db <- c(rep("PDX",nrow(rnaseq$meta)),rep("TCGA",sum(i)))
er <- c(er.type,as.numeric(factor(tcga.meta[i]$breast_carcinoma_estrogen_receptor_status)))
sample.type <- c(rnaseq$meta$sample.type,rep("primary",sum(i)))

pca.human <- pca.run(x,normalise = F,rename = T)
pca.human <- data.table(pca.human,db,er)
ggpairs(pca.human,columns = 1:3,aes(color=db,shape=factor(er)),title = "Without correction")

pca.human <- pca.run(normalize.quantiles(x),normalise = F,rename = T)
pca.human <- data.table(pca.human,db)
ggpairs(pca.human,columns = 1:3,aes(color=db,shape=factor(er)),title = "With quant.norm")

pca.human <- pca.run(removeBatchEffect(x,batch = db,design = model.matrix(~ 0 + sample.type + er)),normalise = F,rename = T)
pca.human <- data.table(pca.human,db)
ggpairs(pca.human,columns = 1:3,aes(color=db,shape=factor(er)),title = "With linear model norm")

pca.human <- pca.run(normalize.quantiles(removeBatchEffect(x,batch = db,design = model.matrix(~ 0 + sample.type + er))),normalise = F,rename = T)
pca.human <- data.table(pca.human,db)
ggpairs(pca.human,columns = 1:3,aes(color=db,shape=factor(er)),title = "With both")

Combining

Quantile correction seperates the datasets more than leaving them untouched. Linear model batch correction works well, though some concern remains w.r.t. ER status. Linear+quantile can’t hurt, but hard to justify. :P Xenografts cluster seperately regardless.

sequencing <- rnaseq$meta[,merged.lanes]
sample.type <- rnaseq$meta[,sample.type]
er.type <- rnaseq$meta[,er.inferred]
her2.type <- rnaseq$meta[,HER2.inferred]
i <- which(rowSums(rnaseq$human$data) != 0)
x <- rnaseq$human$data[i,]
x <- DGEList(x)
x <- calcNormFactors(x) # w/o mouse
#x <- calcNormFactors(x,lib.size = rnaseq$meta[,human.library.size + mouse.library.size] ) # w/ mouse
x <- voom(x,design = model.matrix(~ 0 + sample.type + er.type + her2.type + sequencing))
x <- removeBatchEffect(x$E, batch=sequencing, design=model.matrix(~ 0 + sample.type + er.type + her2.type))
i <- tcga.meta[,
               breast_carcinoma_estrogen_receptor_status %in% c("Negative","Positive") &
               lab_proc_her2_neu_immunohistochemistry_receptor_status %in% c("Negative","Positive")
              ] #810 samples!
y <- DGEList(tcga[,i])
y <- calcNormFactors(y)
y <- voom(y, design = tcga.meta[i,model.matrix(~ 0 + breast_carcinoma_estrogen_receptor_status + lab_proc_her2_neu_immunohistochemistry_receptor_status)])
combined <- cbind(x,y$E[match(rownames(x),rownames(y)),])
combined <- combined[(rowSums(is.na(combined)) == 0),]
# rm(y)
db <- c(rep("PDX",nrow(rnaseq$meta)),rep("TCGA",sum(i)))
er <- c(er.type,toupper(substr(tcga.meta[i]$breast_carcinoma_estrogen_receptor_status,1,3)))
her2 <- c(her2.type,toupper(substr(tcga.meta[i]$lab_proc_her2_neu_immunohistochemistry_receptor_status,1,3)))
sample.type <- c(rnaseq$meta$sample.type,rep("primary",sum(i)))

IC10

Load training data

library(iC10TrainingData)
data("Map.Exp")

PCA of essential genes

PDX biobank only

i <- which((rownames(combined) %in% Map.Exp$Ensembl_ID))
j <- which(db == "PDX")
  
pca.human <- data.table(pca.run(combined[i,j], normalise = F,rename = T, N=NA))
ggpairs(pca.human,columns = 1:3,aes(color=factor(er[j])),title = "Raw")
ggpairs(pca.human,columns = 1:3,aes(color=sample.type[j]),title = "Raw")

pca.human <- data.table(pca.run(
  removeBatchEffect(combined[i,j], batch=sample.type[j], design=model.matrix(~ 0 + er[j])),
  normalise = F,rename = T, N=NA))
ggpairs(pca.human,columns = 1:3,aes(color=factor(er[j])),title = "Corrected")
ggpairs(pca.human,columns = 1:3,aes(color=sample.type[j]),title = "Corrected")

Combined


i <- which((rownames(combined) %in% Map.Exp$Ensembl_ID))

pca.human <- pca.run(combined[i,], normalise = F,rename = T, N=NA)
pca.human <- data.table(pca.human,db)
ggpairs(pca.human,columns = 1:3,aes(color=db),title = "Raw")
ggpairs(pca.human,columns = 1:3,aes(color=factor(er)),title = "Raw")
ggpairs(pca.human,columns = 1:3,aes(color=sample.type),title = "Raw")

pca.human <- pca.run(
  removeBatchEffect(combined[i,],batch = db,design = model.matrix(~ 0 + sample.type + er)),
  normalise = F,rename = T, N=NA)
pca.human <- data.table(pca.human,db)
ggpairs(pca.human,columns = 1:3,aes(color=db),title = "No sample.type correction")
ggpairs(pca.human,columns = 1:3,aes(color=factor(er)),title = "No sample.type correction")
ggpairs(pca.human,columns = 1:3,aes(color=sample.type),title = "No sample.type correction")

pca.human <- pca.run(
  removeBatchEffect(combined[i,], batch=db, batch2=sample.type, design=model.matrix(~ 0 + er)),
  normalise = F,rename = T, N=NA)
pca.human <- data.table(pca.human,db)
ggpairs(pca.human,columns = 1:3,aes(color=db),title = "With sample.type correction")
ggpairs(pca.human,columns = 1:3,aes(color=factor(er)),title = "With sample.type correction")
ggpairs(pca.human,columns = 1:3,aes(color=sample.type),title = "With sample.type correction")

default

x <- combined[rownames(combined) %in% Map.Exp$Ensembl_ID,]
y <- removeBatchEffect(x,batch = db,design = model.matrix(~ 0 + sample.type + er + her2))
Partial NA coefficients for 9 probe(s)
rownames(y) <- rownames(x)
rownames(y) <- Map.Exp[match(rownames(y),Map.Exp$Ensembl_ID),"Gene_symbol"]
y <- y[!is.na(rownames(y)),]
# Run iC10
features <- matchFeatures(Exp=y,Exp.by.feat = "gene")
Found  595  out of  612  Exp features
features <- normalizeFeatures(features, "scale")
res <- iC10(features)
running classifier with only expression...
9 rows with more than 50 % entries missing;
 mean imputation used for these rows
12345678910111213141516171819202122232425262728293012345678910Fold 1 :123456789101112131415161718192021222324252627282930
Fold 2 :123456789101112131415161718192021222324252627282930
Fold 3 :123456789101112131415161718192021222324252627282930
Fold 4 :123456789101112131415161718192021222324252627282930
Fold 5 :123456789101112131415161718192021222324252627282930
Fold 6 :123456789101112131415161718192021222324252627282930
Fold 7 :123456789101112131415161718192021222324252627282930
Fold 8 :123456789101112131415161718192021222324252627282930
Fold 9 :123456789101112131415161718192021222324252627282930
Fold 10 :123456789101112131415161718192021222324252627282930
gof <- goodnessOfFit(res)

Correlation between centroids and predicted profiles:
iC1: 0.868 
iC2: 0.85 
iC3: 0.86 
iC4: 0.854 
iC5: 0.846 
iC6: 0.869 
iC7: 0.867 
iC8: 0.929 
iC9: 0.915 
iC10: 0.889 

Overall correlation: 0.877 
rnaseq$meta$iClust.default <- res$class[1:nrow(rnaseq$meta)]

with gene length correction

x <- combined[rownames(combined) %in% Map.Exp$Ensembl_ID,]
y <- removeBatchEffect(x,batch = db,design = model.matrix(~ 0 + sample.type + er + her2))
Partial NA coefficients for 9 probe(s)
y <- y - log(rnaseq$human$gene.meta$Length/1E3)
longer object length is not a multiple of shorter object length
rownames(y) <- rownames(x)
rownames(y) <- Map.Exp[match(rownames(y),Map.Exp$Ensembl_ID),"Gene_symbol"]
y <- y[!is.na(rownames(y)),]
# Run iC10
features <- matchFeatures(Exp=y,Exp.by.feat = "gene")
Found  595  out of  612  Exp features
features <- normalizeFeatures(features, "scale")
res <- iC10(features)
running classifier with only expression...
9 rows with more than 50 % entries missing;
 mean imputation used for these rows
12345678910111213141516171819202122232425262728293012345678910Fold 1 :123456789101112131415161718192021222324252627282930
Fold 2 :123456789101112131415161718192021222324252627282930
Fold 3 :123456789101112131415161718192021222324252627282930
Fold 4 :123456789101112131415161718192021222324252627282930
Fold 5 :123456789101112131415161718192021222324252627282930
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Fold 7 :123456789101112131415161718192021222324252627282930
Fold 8 :123456789101112131415161718192021222324252627282930
Fold 9 :123456789101112131415161718192021222324252627282930
Fold 10 :123456789101112131415161718192021222324252627282930
gof <- goodnessOfFit(res)

Correlation between centroids and predicted profiles:
iC1: 0.838 
iC2: 0.702 
iC3: 0.819 
iC4: 0.781 
iC5: 0.822 
iC6: 0.764 
iC7: 0.811 
iC8: 0.856 
iC9: 0.887 
iC10: 0.839 

Overall correlation: 0.819 
rnaseq$meta$iClust.gl <- res$class[1:nrow(rnaseq$meta)]

with quantile norm

y <- removeBatchEffect(combined,batch = db,design = model.matrix(~ 0 + sample.type + er + her2))
Partial NA coefficients for 8964 probe(s)
y <- normalize.quantiles(y)
rownames(y) <- rownames(combined)
rownames(y) <- Map.Exp[match(rownames(y),Map.Exp$Ensembl_ID),"Gene_symbol"]
y <- y[!is.na(rownames(y)),]
# Run iC10
features <- matchFeatures(Exp=y,Exp.by.feat = "gene")
Found  595  out of  612  Exp features
features <- normalizeFeatures(features, "scale")
res <- iC10(features)
running classifier with only expression...
9 rows with more than 50 % entries missing;
 mean imputation used for these rows
12345678910111213141516171819202122232425262728293012345678910Fold 1 :123456789101112131415161718192021222324252627282930
Fold 2 :123456789101112131415161718192021222324252627282930
Fold 3 :123456789101112131415161718192021222324252627282930
Fold 4 :123456789101112131415161718192021222324252627282930
Fold 5 :123456789101112131415161718192021222324252627282930
Fold 6 :123456789101112131415161718192021222324252627282930
Fold 7 :123456789101112131415161718192021222324252627282930
Fold 8 :123456789101112131415161718192021222324252627282930
Fold 9 :123456789101112131415161718192021222324252627282930
Fold 10 :123456789101112131415161718192021222324252627282930
gof <- goodnessOfFit(res)

Correlation between centroids and predicted profiles:
iC1: 0.902 
iC2: 0.837 
iC3: 0.824 
iC4: 0.861 
iC5: 0.833 
iC6: 0.834 
iC7: 0.868 
iC8: 0.928 
iC9: 0.895 
iC10: 0.88 

Overall correlation: 0.87 
rnaseq$meta$iClust.quant <- res$class[1:nrow(rnaseq$meta)]

with batch correction for PDX

x <- combined[rownames(combined) %in% Map.Exp$Ensembl_ID,]
y <- removeBatchEffect(x,batch = db, batch2=sample.type, design = model.matrix(~ 0 + er + her2))
rownames(y) <- rownames(x)

rownames(y) <- Map.Exp[match(rownames(y),Map.Exp$Ensembl_ID),"Gene_symbol"]
y <- y[!is.na(rownames(y)),]

# Run iC10
features <- matchFeatures(Exp=y,Exp.by.feat = "gene")
features <- normalizeFeatures(features, "scale")
res <- iC10(features)
gof <- goodnessOfFit(res)

rnaseq$meta$iClust.pdx <- res$class[1:nrow(rnaseq$meta)]
p.IDs <- unique(rnaseq$meta[,.(patient,sample.type)])[,.N,patient][N==2,patient]
x <- rnaseq$meta[patient %in% p.IDs,.(patient,sample.type,iClust.default,iClust.corrected)][order(patient,sample.type)]
x[,.(
  iClust.default[1]==iClust.default[-1],
  iClust.corrected[1]==iClust.corrected[-1]
  ),patient][,.(sum(V1)/.N,sum(V2)/.N,.N)]

x[,.(
  iClust.default[1]==iClust.default[-1],
  iClust.corrected[1]==iClust.corrected[-1]
  ),patient][,.(sum(V1)/.N,sum(V2)/.N,.N),patient]

x[,.(
  iClust.default[1]==iClust.default[-1],
  iClust.corrected[1]==iClust.corrected[-1]
  ),patient][,.(sum(V1)/.N,sum(V2)/.N,.N),patient][,.(mean(V1),mean(V2))]

PAM50

y <- removeBatchEffect(combined,batch = db,design = model.matrix(~ 0 + sample.type + er))
rownames(y) <- rownames(combined)
keyMap <- data.table(getBM(
  attributes=c('entrezgene_id','ensembl_gene_id'),
  filters = 'ensembl_gene_id', 
  values = rownames(y), 
  mart = ensembl.human
))

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rownames(y) <- keyMap[match(rownames(y),keyMap$ensembl_gene_id),]$entrezgene_id
y <- y[!is.na(rownames(y)),]
dmat <- t(y)
dannot <- as.matrix(data.frame("probe"=rownames(y),"EntrezGene.ID" = rownames(y)))
rownames(dannot) <- rownames(y)
pam50.annon <- molecular.subtyping(sbt.model = "pam50",data = dmat,annot = dannot,do.mapping = T)
rnaseq$meta$PAM50 <- pam50.annon$subtype[1:nrow(rnaseq$meta)]
fwrite(rnaseq$meta,"~/Desktop/PDX.rnaseq.char.sample_meta.csv")

#IC10 (subsampling)

Run

#rnaseq.pdx <- subset.PDX(rnaseq,which(rnaseq$meta[,human.library.size>10E6]))

keyMap <- data.table(getBM(
  attributes=c('hgnc_symbol','ensembl_gene_id'),
  filters = 'ensembl_gene_id', 
  values = rnaseq$human$gene.meta$Geneid, 
  mart = ensembl))

subsample.counts <- function(x,totalReads,scaling.factors=NULL){
  y <- sapply(1:ncol(x),function(i){
    y <- x[,i]
    n <- length(y)
    if(is.null(scaling.factors)) N <- totalReads
    else N <- totalReads * scaling.factors[i]
    y <- sample(1:n,N,replace=T,prob=y)
    z <- rep(0,n)
    for(i in 1:N){
      j <- y[i]
      z[j] = z[j] + 1
    }
    z
  })
  rownames(y) <- rownames(x)
  y
}

x <- cbind(rnaseq$human$data,tcga[match(rnaseq$human$gene.meta$Geneid,rownames(tcga)),])

readLimits <- seq(10,2,-2)*1E6

res.pdx <- lapply(readLimits,function(totalReads){
  
  # Subsample and then bind with TCGA
  z <- subsample.counts(x,totalReads,scaling.factors)
  z <- cbind(z,y)
  z <- z[rowSums(z)!=0,]
  
  # Normalise
  #z <- t(1E6 * t(z) / (colSums(z) * calcNormFactors(z)))
  group <- c(rep("PDX",dim(x)[2]),rep("TCGA",dim(y)[2]))
  design <- model.matrix(~ 0 + group)
  z <- voom(z,design)
  
  # Run iC10
  features <- matchFeatures(Exp=z$E,Exp.by.feat = "gene")
  features <- normalizeFeatures(features, "scale")
  res <- iC10(features)
  gof <- goodnessOfFit(res)
  
  res <- res$posterior[1:ncol(x),]
  rownames(res) <- colnames(x)
  
  gof <- gof$indiv[1:ncol(x)]
  names(gof) <- colnames(x)
  return(list("res"=res,"gof"=gof))
})
names(res.pdx) <- paste0(readLimits/1E6,".milion.reads")

Results

z <- rbindlist(lapply(lapply(res.pdx,"[[","res"), melt),idcol = "total.reads")
z <- z[,.(sample.name=Var1,total.mil.reads=as.integer(tstrsplit(total.reads,"\\.")[[1]]),iC10=Var2,iC10.prob=value)]
z$sample.name <- factor(z$sample.name,levels = sort(unique(as.vector(z$sample.name))))
z$iC10 <- factor(z$iC10)

ggplot(z) + aes(x=sample.name,y=iC10.prob,fill=iC10) + geom_col() + facet_grid(total.mil.reads~.) +
  theme_bw(15) + theme(axis.text.x = element_text(angle=-90,hjust = 0)) + xlab("") + 
  scale_fill_manual(values=c('#FF5500', '#00EE76', '#CD3278','#00C5CD', '#8B0000','#FFFF40', '#0000CD', '#FFAA00', '#EE82EE', '#7D26CD'))
z <- data.table(melt(sapply(res.pdx,"[[","gof")))
z <- z[,.(sample.name=Var1,total.mil.reads=as.integer(tstrsplit(Var2,"\\.")[[1]]),gof=value)]
ggplot(z) + aes(x=total.mil.reads,y=gof,group=sample.name) + geom_line()
x <- rnaseq.pdx$human
keyMap <- data.table(getBM(attributes=c('hgnc_symbol','ensembl_gene_id'),filters = 'ensembl_gene_id', values = rownames(x), mart = ensembl))
rownames(x) <- keyMap[match(rownames(x),ensembl_gene_id),hgnc_symbol]

data(Map.Exp)
y <- x[rownames(x) %in% Map.Exp$Gene_symbol,]
y <- y[rowSums(y)!=0,]

z <- rbind(
  data.table(patient=rnaseq.pdx$meta$patient,iC10=apply(res.pdx[[1]]$res,1,which.max),genes="all",pca.run(x)[,1:2]),
  data.table(patient=rnaseq.pdx$meta$patient,iC10=apply(res.pdx[[1]]$res,1,which.max),genes="subset",pca.run(y,N=nrow(y))[,1:2])
)

ggplot(z) + aes(x=PC1,y=PC2,colour=factor(iC10),label=patient) + geom_text() + theme_bw(15) + facet_wrap(~genes,scales = "free")
---
title: 'PDX: IC10 Clustering'
author: "Alistair Martin"
date: '`r format(Sys.time(), "Last modified: %d %b %Y")`'
output:
  html_notebook:
    toc: yes
    toc_float: yes
layout: page
---

# Load libraries & functions
```{r}
root.dir <- "~/OneDrive/projects/"
project.dir <- paste0(root.dir,"PDX/")

source(paste0(root.dir,"R.utils/RNASEQ.utils.R"))
source(paste0(project.dir,"src/load.PDX.R"))
library(iC10)
library(genefu)
library(preprocessCore)

ensembl.human = useEnsembl(biomart="ensembl", dataset="hsapiens_gene_ensembl", GRCh=37)
ensembl.mouse = useEnsembl(biomart="ensembl", dataset="mmusculus_gene_ensembl")
```

# Load PDX data
```{r}
rnaseq <- get.PDX()
meta <- load.meta()
meta <- subset.meta(meta,meta[,project=="characterisation"])
rnaseq <- subset.PDX(rnaseq, rnaseq$meta[,Sample.name] %in% meta[,Sample.name])

rnaseq$meta[Sample.name=="AB793-T1-T" & Pool=="SLX-12501",Sample.name:=paste0(Sample.name,".R2")]
meta <- rbind(meta,meta[Sample.name=="AB793-T1-T"])
meta[nrow(meta),Sample.name:=paste0(Sample.name,".R2")]

rnaseq <- merge.PDX(rnaseq)
#rnaseq$meta[,merged.lanes:=as.numeric(as.factor(merged.lanes))]
rnaseq$meta <- merge(rnaseq$meta,meta,sort=F)

rnaseq <- subset.PDX(rnaseq, rnaseq$meta[,human.library.size > 1e6])
rnaseq <- subset.PDX(rnaseq, rnaseq$meta[,mouse.library.size/(human.library.size+mouse.library.size) < .8])
rnaseq <- subset.PDX(rnaseq, rnaseq$meta[,sample.type!="cell.line"])
```

# PCAs

```{r}
pca.human <- pca.run(rnaseq$human$data)
ggpairs(cbind(pca.human,rnaseq$meta),columns = 1:3,mapping = aes(color=factor(merged.lanes)),title="Coloured by sequencing runs")
ggpairs(cbind(pca.human,rnaseq$meta),columns = 1:3,mapping = aes(color=factor(sample.type)),title="Coloured by sample type")
ggpairs(cbind(pca.human,rnaseq$meta),columns = 1:3,mapping = aes(color=cut(mouse.library.size/(human.library.size+mouse.library.size),quantile(mouse.library.size/(human.library.size+mouse.library.size)))),title="Coloured by mouse fraction")
```


```{R}
x <- cbind(pca.human,rnaseq$meta)
x[sample.type=="xenograft" & PC1>-2 & PC2>5,.(Sample.name,merged.lanes,PC1)]
x[sample.type=="primary" & PC1< -2 & PC2>5,.(Sample.name,merged.lanes,PC1)]
```

```{r}
(y <- x[merged.lanes %in% c("SLX-12501:HFV2VBBXX:s_5"),.(Sample.name,sample.type,primary.on.pca=PC1>-2,PC1)])
y[,.N,.(sample.type,primary.on.pca)]
```

```{r}
(y <- x[merged.lanes %in% c("SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7"),.(Sample.name,sample.type,primary.on.pca=PC1>-2,PC1)])
y[,.N,.(sample.type,primary.on.pca)]
```


# Remove bad(?) libraries & repeat PCA

```{r}
rnaseq <- subset.PDX(rnaseq, rnaseq$meta[,!(merged.lanes %in% c("SLX-12501:HFV2VBBXX:s_5","SLX-12507:HFV2VBBXX:s_6;SLX-12507:HFV2VBBXX:s_7"))])
rnaseq$meta[,merged.lanes:=as.numeric(as.factor(merged.lanes))]
```

```{r}
pca.human <- pca.run(rnaseq$human$data,rename = T)
pca.human <- cbind(pca.human,rnaseq$meta)
ggpairs(pca.human,columns = 1:3,mapping = aes(color=factor(merged.lanes)),title="Coloured by sequencing runs")
ggpairs(pca.human,columns = 1:3,mapping = aes(color=factor(sample.type)),title="Coloured by sample type")
ggpairs(pca.human,columns = 1:3,mapping = aes(color=ER_PAT),title="Coloured by ER_PAT status")
ggpairs(pca.human,columns = 1:3,mapping = aes(color=ER_IHC_PDX),title="Coloured by ER_IHC_PDX status")
```

We see that while some batch effect remains between the samples, the major drivers of variability is xenograft vs primary alongside ER status. For the latter of these, we see more seperation by ER in xenographs, though this could be due to the biased composition of the cohort. 

```{r}
for(stype in unique(rnaseq$meta$sample.type)){
  x <- subset.PDX(rnaseq,rnaseq$meta$sample.type == stype)
  pca.human <- pca.run(x$human$data,rename = T)
  pca.human <- cbind(pca.human,x$meta)
  print(ggpairs(pca.human,columns = 1:3,mapping = aes(color=factor(merged.lanes)),title=paste(stype,"Coloured by sequencing runs")))
  print(ggpairs(pca.human,columns = 1:3,mapping = aes(color=ER_PAT),title=paste(stype,"Coloured by ER_PAT status")))
  if(stype == "xenograft") print(ggpairs(pca.human,columns = 1:3,mapping = aes(color=ER_IHC_PDX),title=paste(stype,"Coloured by ER_IHC_PDX status")))
}
```

We still don't see seperation by ER status in the primary samples when we analyse them independently of the xenografts. As to the xenograft samples, we see clearly the batch effect by (sequencing) run. We also see seperation due to ER status. Curriously, some samples do not cluster with the ER status they were found to have by IHC.

```{r}
x <- subset.PDX(rnaseq,rnaseq$meta$sample.type == "xenograft")
pca.human <- pca.run(x$human$data,rename = T)
pca.human <- cbind(pca.human,x$meta)
pca.human[ER_PAT != "" & ER_IHC_PDX != "",sum(ER_PAT!=ER_IHC_PDX)/.N]

set.seed(1)
pca.human$er.pca <- as.factor(kmeans(pca.human[,1],2)$cluster)
levels(pca.human$er.pca) <- c("NEG","POS")
table(pca.human[ER_PAT != "",.(er.pca,ER_PAT)])
table(pca.human[ER_IHC_PDX %in% c("POS","NEG"),.(er.pca,ER_IHC_PDX)])
```

17% of samples change ER status according to IHC.
83% accuracy w.r.t IHC on patients.
86% accuracy w.r.t IHC on xenografts.

Unsuprisingly, the testing on xenografts works better, though an error rate greater than 10% is till concerning.

```{r}
x <- subset.PDX(rnaseq,rnaseq$meta$sample.type == "xenograft")

pca.human <- pca.run(x$human$data)
set.seed(1)
x$meta$er.pca <- as.factor(kmeans(pca.human[,1],2)$cluster)
levels(x$meta$er.pca) <- c("NEG","POS")

y <- norm.count.matrix(x$human$data,lib.sizes = colSums(x$human$data))
x$meta$ER.exp <- y[which(rownames(y) == "ENSG00000091831"),]

x <- x$meta[,.(Sample.name,ER.exp,er.pca,ER_PAT,ER_IHC_PDX)]
x <- melt(x,id.vars = 1:2)

ggplot(x[value %in% c("NEG","POS")], aes(x=variable,y=ER.exp,colour=value)) + geom_boxplot() + geom_point() +theme_tufte()
```

ER expression does not exclusively drive the clustering, as we see many samples with low ER expression in the "NEG" cluster. However, it should be noted the samples that express ER differently to that found in ER_IHC_PDX.

```{R}
print("False neg:")
x[variable=="ER_IHC_PDX" & value=="NEG"][order(-ER.exp)][1]
print("False pos:")
x[variable=="ER_IHC_PDX" & value=="POS"][order(ER.exp)][1:2]
```

```{r}
x <- subset.PDX(rnaseq,rnaseq$meta$sample.type == "xenograft")
y <- pca.prep(x$human$data,T,1000,colSums(x$human$data))
y <- prcomp(t(y),scale=T)

pc1 <- y$rotation[,1]
pc1 <- data.table(ENSEMBL=names(pc1),value=pc1)
pc1 <- data.table(merge(biomaRt::select(org.Hs.eg.db,keys=pc1$ENSEMBL,keytype = "ENSEMBL",
                columns = c("ENSEMBL","ENTREZID","SYMBOL","GENENAME"),all.x=T),pc1))

pc1[order(-abs(value))][1:20,.(SYMBOL,GENENAME,value)]
```

No one marker gene dominates PC1. For reference, ESR1 has rank 88.

```{r}
y <- norm.count.matrix(rnaseq$human$data,lib.sizes = colSums(rnaseq$human$data))
x <- cbind(rnaseq$meta,ER.exp = y[which(rownames(y) == "ENSG00000091831"),])
ggplot(x,aes(x=sample.type,y=ER.exp,color=factor(kmeans(x$ER.exp,2)$cluster))) + geom_jitter(width=.2)
```

Kmeans method can be expanded to include promary samples.

Summary:
- Batch effect due to sequencing to correct.
- Xenograft/Primary and ER.status drives variability.

# Derive genotype thresholds

## ER

```{r}
x <- log(calculate_tpm(rnaseq$human$data,rnaseq$human$gene.meta$Length)+0.5)
y <- cbind(rnaseq$meta,ER.exp=x[which(rownames(x) == "ENSG00000091831"),])
ggplot(y) + aes(x=reorder(Sample.name,ER.exp),y=ER.exp,color=ER_IHC_PDX) + geom_point() + facet_grid(sample.type~merged.lanes) + theme(axis.text.x = element_blank())
ggplot(y) + aes(x=reorder(Sample.name,ER.exp),y=ER.exp,color=ER_PAT) + geom_point() + facet_grid(sample.type~merged.lanes) + theme(axis.text.x = element_blank())
```

 Ideally we would do the assignment of pos/neg within lanes, but that isn't possible due to some lanes containing only POS.

```{r}
library(pROC)
x <- log(calculate_tpm(rnaseq$human$data,rnaseq$human$gene.meta$Length)+0.5)
y <- cbind(rnaseq$meta,ER.exp=x[which(rownames(x) == "ENSG00000091831"),])

roc.pdx <- y[ER_IHC_PDX %in% c("POS","NEG") & sample.type=="xenograft",roc(ER_IHC_PDX,ER.exp)]
plot(roc.pdx)
(er.thresh.pdx <- data.table(t(coords(roc.pdx,"all",ret=c("threshold","accuracy"))))[which.max(accuracy),threshold])

roc.pri <- y[ER_PAT %in% c("POS","NEG") & sample.type=="primary",roc(ER_PAT,ER.exp)]
plot(roc.pri)
(er.thresh.pri <- data.table(t(coords(roc.pri,"all",ret=c("threshold","accuracy"))))[which.max(accuracy),threshold])

ggplot(y) + aes(x=reorder(Sample.name,ER.exp),y=ER.exp,color=ER_IHC_PDX) + geom_point() + facet_grid(sample.type~merged.lanes) + theme(axis.text.x = element_blank()) + geom_hline(aes(yintercept=er.thresh.pdx))

ggplot(y) + aes(x=reorder(Sample.name,ER.exp),y=ER.exp,color=ER_PAT) + geom_point() + facet_grid(sample.type~merged.lanes) + theme(axis.text.x = element_blank()) + geom_hline(aes(yintercept=er.thresh.pri))
```

```{r}
y[,er.inferred:=ifelse(sample.type=="xenograft", ifelse(ER.exp>er.thresh.pdx,"POS","NEG"), ifelse(ER.exp>er.thresh.pri,"POS","NEG"))]
ggplot(y) + aes(x=reorder(Sample.name,ER.exp),y=ER.exp,color=er.inferred) + geom_point() + facet_grid(sample.type~merged.lanes) + theme(axis.text.x = element_blank())
```

```{r}
rnaseq$meta$er.inferred <- y$er.inferred
```

## HER2

```{r}
x <- log(calculate_tpm(rnaseq$human$data,rnaseq$human$gene.meta$Length)+0.5)
y <- cbind(rnaseq$meta,HER2.exp=x[which(rownames(x) == "ENSG00000141736"),])
ggplot(y) + aes(x=reorder(Sample.name,HER2.exp),y=HER2.exp,color=HER2_PDX) + geom_point() + facet_grid(sample.type~merged.lanes) + theme(axis.text.x = element_blank())
ggplot(y) + aes(x=reorder(Sample.name,HER2.exp),y=HER2.exp,color=HER2_PAT) + geom_point() + facet_grid(sample.type~merged.lanes) + theme(axis.text.x = element_blank())
```

 Ideally we would do the assignment of pos/neg within lanes, but that isn't possible due to some lanes containing only POS.

```{r}
library(pROC)

roc.pdx <- y[HER2_PDX %in% c("POS","NEG") & sample.type=="xenograft",roc(HER2_PDX,HER2.exp)]
plot(roc.pdx)
(HER2.thresh.pdx <- data.table(t(coords(roc.pdx,"all",ret=c("threshold","accuracy"))))[which.max(accuracy),threshold])

roc.pri <- y[HER2_PAT %in% c("POS","NEG") & sample.type=="primary",roc(HER2_PAT,HER2.exp)]
plot(roc.pri)
(HER2.thresh.pri <- data.table(t(coords(roc.pri,"all",ret=c("threshold","accuracy"))))[which.max(accuracy),threshold])

ggplot(y) + aes(x=reorder(Sample.name,HER2.exp),y=HER2.exp,color=HER2_PDX) + geom_point() + facet_grid(sample.type~merged.lanes) + theme(axis.text.x = element_blank()) + geom_hline(aes(yintercept=HER2.thresh.pdx))

ggplot(y) + aes(x=reorder(Sample.name,HER2.exp),y=HER2.exp,color=HER2_PAT) + geom_point() + facet_grid(sample.type~merged.lanes) + theme(axis.text.x = element_blank()) + geom_hline(aes(yintercept=HER2.thresh.pri))
```

```{r}
y[,HER2.inferred:=ifelse(sample.type=="xenograft", ifelse(HER2.exp>HER2.thresh.pdx,"POS","NEG"), ifelse(HER2.exp>HER2.thresh.pri,"POS","NEG"))]
ggplot(y) + aes(x=reorder(Sample.name,HER2.exp),y=HER2.exp,color=HER2.inferred) + geom_point() + facet_grid(sample.type~merged.lanes) + theme(axis.text.x = element_blank())
```

```{r}
rnaseq$meta$HER2.inferred <- y$HER2.inferred
```


# Batch correction on TPMs

## Without batch correction

```{r}
x <- log(calculate_tpm(rnaseq$human$data,rnaseq$human$gene.meta$Length)+0.5)
pca.human <- pca.run(x,normalise = F)
pca.human <- cbind(pca.human,rnaseq$meta)

ggpairs(pca.human,columns = 1:3,mapping = aes(color=factor(merged.lanes)),title="Coloured by sequencing runs")
ggpairs(pca.human,columns = 1:3,mapping = aes(color=factor(sample.type)),title="Coloured by sample type")
ggpairs(pca.human,columns = 1:3,mapping = aes(color=ER_PAT),title="Coloured by ER_PAT status")
ggpairs(pca.human,columns = 1:3,mapping = aes(color=ER_IHC_PDX),title="Coloured by ER_IHC_PDX status")
```

## With batch correction

```{r}
x <- log(calculate_tpm(rnaseq$human$data,rnaseq$human$gene.meta$Length)+0.5)

sequencing <- rnaseq$meta[,merged.lanes]
sample.type <- rnaseq$meta[,sample.type]
er.type <- rnaseq$meta$er.inferred
her2.type <- rnaseq$meta$HER2.inferred

d <- model.matrix(~ 0 + sample.type + er.type + her2.type)
x <-  removeBatchEffect(x,batch = sequencing,design = d)

pca.human <- pca.run(x,normalise = F,rename = T)
pca.human <- cbind(pca.human,rnaseq$meta)

ggpairs(pca.human,columns = 1:3,mapping = aes(color=factor(merged.lanes)),title="Coloured by sequencing runs")
ggpairs(pca.human,columns = 1:3,mapping = aes(color=factor(sample.type)),title="Coloured by sample type")
ggpairs(pca.human,columns = 1:3,mapping = aes(color=ER_PAT),title="Coloured by ER_PAT status")
ggpairs(pca.human,columns = 1:3,mapping = aes(color=ER_IHC_PDX),title="Coloured by ER_IHC_PDX status")
```

# Calc. & Write TPMs

## Default

```{r}
x <- log(calculate_tpm(rnaseq$human$data,rnaseq$human$gene.meta$Length)+0.5)

sequencing <- rnaseq$meta[,merged.lanes]
sample.type <- rnaseq$meta[,sample.type]
er.type <- rnaseq$meta$er.inferred
her2.type <- rnaseq$meta$HER2.inferred

d <- model.matrix(~ 0 + sample.type + er.type + her2.type)

rnaseq.TPMs <- list(
  meta = rnaseq$meta,
  human = list(
    gene.meta = rnaseq$human$gene.meta,
    TPMs = calculate_tpm(rnaseq$human$data,rnaseq$human$gene.meta$Length)
  ),
  mouse = list(
    gene.meta = rnaseq$mouse$gene.meta,
    TPMs = calculate_tpm(rnaseq$mouse$data,rnaseq$mouse$gene.meta$Length)
  )
)

rnaseq.TPMs$human$TPMs.correct <- removeBatchEffect(log(rnaseq.TPMs$human$TPMs+0.5),batch = sequencing,design = d)
rnaseq.TPMs$mouse$TPMs.correct <- removeBatchEffect(log(rnaseq.TPMs$mouse$TPMs+0.5),batch = sequencing,design = d)

keyMap <- data.table(getBM(
  attributes=c('hgnc_symbol','ensembl_gene_id'),
  filters = 'ensembl_gene_id', 
  values = rownames(rnaseq.TPMs$human$TPMs.correct), 
  mart = ensembl.human
))
rownames(rnaseq.TPMs$human$TPMs.correct) <- keyMap[match(rownames(rnaseq.TPMs$human$TPMs.correct),keyMap$ensembl_gene_id),]$hgnc_symbol
rnaseq.TPMs$human$TPMs.correct <- rnaseq.TPMs$human$TPMs.correct[rownames(rnaseq.TPMs$human$TPMs.correct) != "",]
rnaseq.TPMs$human$TPMs.correct <- rnaseq.TPMs$human$TPMs.correct[(rowSums(is.na(rnaseq.TPMs$human$TPMs.correct)) == 0),]

keyMap <- data.table(getBM(
  attributes=c('mgi_symbol','ensembl_gene_id'),
  filters = 'ensembl_gene_id', 
  values = rownames(rnaseq.TPMs$mouse$TPMs.correct), 
  mart = ensembl.mouse
))
rownames(rnaseq.TPMs$mouse$TPMs.correct) <- keyMap[match(rownames(rnaseq.TPMs$mouse$TPMs.correct),keyMap$ensembl_gene_id),]$mgi_symbol
rnaseq.TPMs$mouse$TPMs.correct <- rnaseq.TPMs$mouse$TPMs.correct[rownames(rnaseq.TPMs$mouse$TPMs.correct) != "",]
rnaseq.TPMs$mouse$TPMs.correct <- rnaseq.TPMs$mouse$TPMs.correct[(rowSums(is.na(rnaseq.TPMs$mouse$TPMs.correct)) == 0),]
```

```{r}
i <- rnaseq$meta[,which(patient=="AB559")]
j <- rowSums(rnaseq.TPMs$human$TPMs.correct[,i]==0) != 2
quantile(apply(rnaseq.TPMs$human$TPMs.correct[j,i],1,diff))
cor(rnaseq.TPMs$human$TPMs.correct[,i])
boxplot(cor(rnaseq.TPMs$human$TPMs.correct))
```

```{r,eval=F}
fwrite(rnaseq.TPMs$meta,"~/Desktop/PDX.rnaseq.char.sample_meta.csv")
#fwrite(rnaseq.TPMs$human$humangene.meta,"~/Desktop/PDX.rnaseq.char.human.gene_meta.csv")
fwrite(as.data.table(rnaseq.TPMs$human$TPMs.correct,keep.rownames = "Geneid"),"~/Desktop/PDX.rnaseq.char.human.TPMs_corrected.csv")
#fwrite(as.data.table(rnaseq.TPMs$data.TPMs,keep.rownames = "Geneid"),"~/Desktop/PDX.rnaseq.char.mouse.TPMs.csv")
fwrite(as.data.table(rnaseq.TPMs$mouse$TPMs.correct,keep.rownames = "Geneid"),"~/Desktop/PDX.rnaseq.char.mouse.TPMs_corrected.csv")
```
 

 
## Inc. mouse

```{r}
x <- log(calculate_tpm(rnaseq$human$data,rnaseq$human$gene.meta$Length)+0.5)
set.seed(1); er.type <- kmeans(x[which(rownames(x) == "ENSG00000091831"),],2)$cluster
sequencing <- rnaseq$meta[,merged.lanes]
sample.type <- rnaseq$meta[,sample.type]
d <- model.matrix(~ 0 + sample.type + er.type)

rnaseq.TPMs <- list(
  meta = rnaseq$meta,
  human = list(
    gene.meta = rnaseq$human$gene.meta,
    TPMs = calculate_tpm(rnaseq$human$data,
                         rnaseq$human$gene.meta$Length,
                         ls=colSums(rnaseq$human$data) + colSums(rnaseq$mouse$data))
  ),
  mouse = list(
    gene.meta = rnaseq$mouse$gene.meta,
    TPMs = calculate_tpm(rnaseq$mouse$data,
                         rnaseq$mouse$gene.meta$Length,
                         ls=colSums(rnaseq$human$data) + colSums(rnaseq$mouse$data))
  )
)

rnaseq.TPMs$human$TPMs.correct <- removeBatchEffect(log(rnaseq.TPMs$human$TPMs+0.5),batch = sequencing,design = d)
rnaseq.TPMs$mouse$TPMs.correct <- removeBatchEffect(log(rnaseq.TPMs$mouse$TPMs+0.5),batch = sequencing,design = d)

keyMap <- data.table(getBM(
  attributes=c('hgnc_symbol','ensembl_gene_id'),
  filters = 'ensembl_gene_id', 
  values = rownames(rnaseq.TPMs$human$TPMs.correct), 
  mart = ensembl.human
))
rownames(rnaseq.TPMs$human$TPMs.correct) <- keyMap[match(rownames(rnaseq.TPMs$human$TPMs.correct),keyMap$ensembl_gene_id),]$hgnc_symbol
rnaseq.TPMs$human$TPMs.correct <- rnaseq.TPMs$human$TPMs.correct[rownames(rnaseq.TPMs$human$TPMs.correct) != "",]
rnaseq.TPMs$human$TPMs.correct <- rnaseq.TPMs$human$TPMs.correct[(rowSums(is.na(rnaseq.TPMs$human$TPMs.correct)) == 0),]

keyMap <- data.table(getBM(
  attributes=c('mgi_symbol','ensembl_gene_id'),
  filters = 'ensembl_gene_id', 
  values = rownames(rnaseq.TPMs$mouse$TPMs.correct), 
  mart = ensembl.mouse
))
rownames(rnaseq.TPMs$mouse$TPMs.correct) <- keyMap[match(rownames(rnaseq.TPMs$mouse$TPMs.correct),keyMap$ensembl_gene_id),]$mgi_symbol
rnaseq.TPMs$mouse$TPMs.correct <- rnaseq.TPMs$mouse$TPMs.correct[rownames(rnaseq.TPMs$mouse$TPMs.correct) != "",]
rnaseq.TPMs$mouse$TPMs.correct <- rnaseq.TPMs$mouse$TPMs.correct[(rowSums(is.na(rnaseq.TPMs$mouse$TPMs.correct)) == 0),]
```

```{r,eval=F}
#fwrite(rnaseq.TPMs$meta,"~/Desktop/PDX.rnaseq.char.sample_meta.csv")
#fwrite(rnaseq.TPMs$human$humangene.meta,"~/Desktop/PDX.rnaseq.char.human.gene_meta.csv")
fwrite(as.data.table(rnaseq.TPMs$human$TPMs.correct,keep.rownames = "Geneid"),"~/Desktop/PDX.rnaseq.char.human.TPMs_corrected_libsize.csv")
#fwrite(as.data.table(rnaseq.TPMs$data.TPMs,keep.rownames = "Geneid"),"~/Desktop/PDX.rnaseq.char.mouse.TPMs.csv")
fwrite(as.data.table(rnaseq.TPMs$mouse$TPMs.correct,keep.rownames = "Geneid"),"~/Desktop/PDX.rnaseq.char.mouse.TPMs_corrected_libsize.csv")
```

# Combining with TCGA

## Load TCGA data

```{r}
fname <- paste0(root.dir,"tcga/data/rnaseq.RDS")
if(!file.exists(fname)){
  x <- lapply(list.dirs(paste0(root.dir,"tcga/data/rnaseq"),recursive = F),
              function(x) fread(cmd=paste("gzip -dc",list.files(x,pattern = "*.gz",full.names = T)[1]))
              )
  tcga <- as.matrix(do.call(cbind,lapply(x, function(y) y[,2])))
  rownames(tcga) <- tstrsplit(unlist(x[[1]][,1]),"\\.")[[1]]
  colnames(tcga) <- basename(list.dirs(paste0(root.dir,"tcga/data/rnaseq")))
  rm(x)
  saveRDS(tcga,fname)
}
tcga <- readRDS(fname)

fname <- paste0(root.dir,"tcga/data/rnaseq.meta.csv")
if(!file.exists(fname)){
  library(GenomicDataCommons)
  TCGAtranslateID = function(file_ids, legacy = FALSE) {
    info = files(legacy = legacy) %>%
        filter( ~ file_id %in% file_ids) %>%
        select('cases.samples.submitter_id') %>%
        results_all()
    
    id_list = lapply(info$cases,function(a) {
        a[[1]][[1]][[1]]})

    barcodes_per_file = sapply(id_list,length)
    
    return(data.frame(file_id = rep(ids(info),barcodes_per_file),
                    submitter_id = unlist(id_list)))
  }
  fnames <- basename(list.dirs(paste0(root.dir,"tcga/data/rnaseq"),recursive = F))
  tcga.meta <- data.table(TCGAtranslateID(fnames))
  tcga.meta <- tcga.meta[match(fnames,file_id)]
  tcga.meta[,bcr_patient_barcode:=substr(submitter_id,0,12)]
  
  clinical <- fread(paste0(root.dir,"tcga/data/clincal_meta_brca.txt"),skip = 1)
  tcga.meta <- merge(tcga.meta,clinical,all.x=T,sort=F)
  
  fwrite(tcga.meta,fname)
}
tcga.meta <- fread(fname)
```

## PCA (TCGA only)

```{r}
pca.human <- pca.run(tcga,normalise = T)
pca.human <- cbind(pca.human,tcga.meta)
ggpairs(pca.human,columns = 1:3,aes(colour=breast_carcinoma_estrogen_receptor_status))
```

##PCA (combined) w/ various normalisations

```{r}
x <- log(calculate_tpm(rnaseq$human$data,rnaseq$human$gene.meta$Length)+0.5)
sequencing <- rnaseq$meta[,merged.lanes]
sample.type <- rnaseq$meta[,sample.type]
set.seed(1); er.type <- kmeans(x[which(rownames(x) == "ENSG00000091831"),],2)$cluster

i <- which(rowSums(rnaseq$human$data) != 0)
x <- rnaseq$human$data[i,]
x <- DGEList(x)
x <- calcNormFactors(x)
x <- voom(x,design = model.matrix(~ 0 + sample.type + er.type + sequencing))
x <- removeBatchEffect(x$E, batch=sequencing, design=model.matrix(~ 0 + sample.type + er.type))

i <- tcga.meta[,breast_carcinoma_estrogen_receptor_status %in% c("Negative","Positive")]
y <- DGEList(tcga[,i])
y <- calcNormFactors(y)
y <- voom(y, design = model.matrix(~ 0 + tcga.meta$breast_carcinoma_estrogen_receptor_status[i]))

x <- cbind(x,y$E[match(rownames(x),rownames(y)),])
rm(y)

db <- c(rep("PDX",nrow(rnaseq$meta)),rep("TCGA",sum(i)))
er <- c(er.type,as.numeric(factor(tcga.meta[i]$breast_carcinoma_estrogen_receptor_status)))
sample.type <- c(rnaseq$meta$sample.type,rep("primary",sum(i)))

pca.human <- pca.run(x,normalise = F,rename = T)
pca.human <- data.table(pca.human,db,er)
ggpairs(pca.human,columns = 1:3,aes(color=db,shape=factor(er)),title = "Without correction")

pca.human <- pca.run(normalize.quantiles(x),normalise = F,rename = T)
pca.human <- data.table(pca.human,db)
ggpairs(pca.human,columns = 1:3,aes(color=db,shape=factor(er)),title = "With quant.norm")

pca.human <- pca.run(removeBatchEffect(x,batch = db,design = model.matrix(~ 0 + sample.type + er)),normalise = F,rename = T)
pca.human <- data.table(pca.human,db)
ggpairs(pca.human,columns = 1:3,aes(color=db,shape=factor(er)),title = "With linear model norm")

pca.human <- pca.run(normalize.quantiles(removeBatchEffect(x,batch = db,design = model.matrix(~ 0 + sample.type + er))),normalise = F,rename = T)
pca.human <- data.table(pca.human,db)
ggpairs(pca.human,columns = 1:3,aes(color=db,shape=factor(er)),title = "With both")
```

## Combining

Quantile correction seperates the datasets more than leaving them untouched.
Linear model batch correction works well, though some concern remains w.r.t. ER status.
Linear+quantile can't hurt, but hard to justify. :P
Xenografts cluster seperately regardless.

```{r}
sequencing <- rnaseq$meta[,merged.lanes]
sample.type <- rnaseq$meta[,sample.type]
er.type <- rnaseq$meta[,er.inferred]
her2.type <- rnaseq$meta[,HER2.inferred]

#i <- which(rowSums(rnaseq$human$data) != 0)
x <- rnaseq$human$data
x <- DGEList(x)
x <- calcNormFactors(x) # w/o mouse
#x <- calcNormFactors(x,lib.size = rnaseq$meta[,human.library.size + mouse.library.size] ) # w/ mouse
x <- voom(x,design = model.matrix(~ 0 + sample.type + er.type + her2.type + sequencing))
x <- removeBatchEffect(x$E, batch=sequencing, design=model.matrix(~ 0 + sample.type + er.type + her2.type))

i <- tcga.meta[,
               breast_carcinoma_estrogen_receptor_status %in% c("Negative","Positive") &
               lab_proc_her2_neu_immunohistochemistry_receptor_status %in% c("Negative","Positive")
              ] #810 samples!
y <- DGEList(tcga[,i])
y <- calcNormFactors(y)
y <- voom(y, design = tcga.meta[i,model.matrix(~ 0 + breast_carcinoma_estrogen_receptor_status + lab_proc_her2_neu_immunohistochemistry_receptor_status)])

combined <- cbind(x,y$E[match(rownames(x),rownames(y)),])
#combined <- combined[(rowSums(is.na(combined)) == 0),]
# rm(y)

db <- c(rep("PDX",nrow(rnaseq$meta)),rep("TCGA",sum(i)))
er <- c(er.type,toupper(substr(tcga.meta[i]$breast_carcinoma_estrogen_receptor_status,1,3)))
her2 <- c(her2.type,toupper(substr(tcga.meta[i]$lab_proc_her2_neu_immunohistochemistry_receptor_status,1,3)))
sample.type <- c(rnaseq$meta$sample.type,rep("primary",sum(i)))
```

# IC10

## Load training data

```{R}
library(iC10TrainingData)
data("Map.Exp")
```

## PCA of essential genes

### PDX biobank only

```{r}
i <- which((rownames(combined) %in% Map.Exp$Ensembl_ID))
j <- which(db == "PDX")
  
pca.human <- data.table(pca.run(combined[i,j], normalise = F,rename = T, N=NA))
ggpairs(pca.human,columns = 1:3,aes(color=factor(er[j])),title = "Raw")
ggpairs(pca.human,columns = 1:3,aes(color=sample.type[j]),title = "Raw")

pca.human <- data.table(pca.run(
  removeBatchEffect(combined[i,j], batch=sample.type[j], design=model.matrix(~ 0 + er[j])),
  normalise = F,rename = T, N=NA))
ggpairs(pca.human,columns = 1:3,aes(color=factor(er[j])),title = "Corrected")
ggpairs(pca.human,columns = 1:3,aes(color=sample.type[j]),title = "Corrected")
```

### Combined


```{r}

i <- which((rownames(combined) %in% Map.Exp$Ensembl_ID))

pca.human <- pca.run(combined[i,], normalise = F,rename = T, N=NA)
pca.human <- data.table(pca.human,db)
ggpairs(pca.human,columns = 1:3,aes(color=db),title = "Raw")
ggpairs(pca.human,columns = 1:3,aes(color=factor(er)),title = "Raw")
ggpairs(pca.human,columns = 1:3,aes(color=sample.type),title = "Raw")

pca.human <- pca.run(
  removeBatchEffect(combined[i,],batch = db,design = model.matrix(~ 0 + sample.type + er)),
  normalise = F,rename = T, N=NA)
pca.human <- data.table(pca.human,db)
ggpairs(pca.human,columns = 1:3,aes(color=db),title = "No sample.type correction")
ggpairs(pca.human,columns = 1:3,aes(color=factor(er)),title = "No sample.type correction")
ggpairs(pca.human,columns = 1:3,aes(color=sample.type),title = "No sample.type correction")

pca.human <- pca.run(
  removeBatchEffect(combined[i,], batch=db, batch2=sample.type, design=model.matrix(~ 0 + er)),
  normalise = F,rename = T, N=NA)
pca.human <- data.table(pca.human,db)
ggpairs(pca.human,columns = 1:3,aes(color=db),title = "With sample.type correction")
ggpairs(pca.human,columns = 1:3,aes(color=factor(er)),title = "With sample.type correction")
ggpairs(pca.human,columns = 1:3,aes(color=sample.type),title = "With sample.type correction")
```

## default

```{r}
x <- combined[rownames(combined) %in% Map.Exp$Ensembl_ID,]
y <- removeBatchEffect(x,batch = db,design = model.matrix(~ 0 + sample.type + er + her2))
rownames(y) <- rownames(x)

rownames(y) <- Map.Exp[match(rownames(y),Map.Exp$Ensembl_ID),"Gene_symbol"]
y <- y[!is.na(rownames(y)),]

# Run iC10
features <- matchFeatures(Exp=y,Exp.by.feat = "gene")
features <- normalizeFeatures(features, "scale")
res <- iC10(features)
gof <- goodnessOfFit(res)

rnaseq$meta$iClust.default <- res$class[1:nrow(rnaseq$meta)]
```


## with gene length correction

```{r}
x <- combined[rownames(combined) %in% Map.Exp$Ensembl_ID,]
y <- removeBatchEffect(x,batch = db,design = model.matrix(~ 0 + sample.type + er + her2))
y <- y - log(rnaseq$human$gene.meta$Length/1E3)
rownames(y) <- rownames(x)

rownames(y) <- Map.Exp[match(rownames(y),Map.Exp$Ensembl_ID),"Gene_symbol"]
y <- y[!is.na(rownames(y)),]

# Run iC10
features <- matchFeatures(Exp=y,Exp.by.feat = "gene")
features <- normalizeFeatures(features, "scale")
res <- iC10(features)
gof <- goodnessOfFit(res)

rnaseq$meta$iClust.gl <- res$class[1:nrow(rnaseq$meta)]
```

## with quantile norm

```{r}
y <- removeBatchEffect(combined,batch = db,design = model.matrix(~ 0 + sample.type + er + her2))
y <- normalize.quantiles(y)
rownames(y) <- rownames(combined)

rownames(y) <- Map.Exp[match(rownames(y),Map.Exp$Ensembl_ID),"Gene_symbol"]
y <- y[!is.na(rownames(y)),]

# Run iC10
features <- matchFeatures(Exp=y,Exp.by.feat = "gene")
features <- normalizeFeatures(features, "scale")
res <- iC10(features)
gof <- goodnessOfFit(res)

rnaseq$meta$iClust.quant <- res$class[1:nrow(rnaseq$meta)]
```

## with batch correction for PDX

```{r, eval=F}
x <- combined[rownames(combined) %in% Map.Exp$Ensembl_ID,]
y <- removeBatchEffect(x,batch = db, batch2=sample.type, design = model.matrix(~ 0 + er + her2))
rownames(y) <- rownames(x)

rownames(y) <- Map.Exp[match(rownames(y),Map.Exp$Ensembl_ID),"Gene_symbol"]
y <- y[!is.na(rownames(y)),]

# Run iC10
features <- matchFeatures(Exp=y,Exp.by.feat = "gene")
features <- normalizeFeatures(features, "scale")
res <- iC10(features)
gof <- goodnessOfFit(res)

rnaseq$meta$iClust.pdx <- res$class[1:nrow(rnaseq$meta)]
```

```{r}
p.IDs <- unique(rnaseq$meta[,.(patient,sample.type)])[,.N,patient][N==2,patient]
x <- rnaseq$meta[patient %in% p.IDs,.(patient,sample.type,iClust.default,iClust.corrected)][order(patient,sample.type)]
x[,.(
  iClust.default[1]==iClust.default[-1],
  iClust.corrected[1]==iClust.corrected[-1]
  ),patient][,.(sum(V1)/.N,sum(V2)/.N,.N)]

x[,.(
  iClust.default[1]==iClust.default[-1],
  iClust.corrected[1]==iClust.corrected[-1]
  ),patient][,.(sum(V1)/.N,sum(V2)/.N,.N),patient]

x[,.(
  iClust.default[1]==iClust.default[-1],
  iClust.corrected[1]==iClust.corrected[-1]
  ),patient][,.(sum(V1)/.N,sum(V2)/.N,.N),patient][,.(mean(V1),mean(V2))]
```

# PAM50

```{r}
y <- removeBatchEffect(combined,batch = db,design = model.matrix(~ 0 + sample.type + er))
rownames(y) <- rownames(combined)

keyMap <- data.table(getBM(
  attributes=c('entrezgene_id','ensembl_gene_id'),
  filters = 'ensembl_gene_id', 
  values = rownames(y), 
  mart = ensembl.human
))
rownames(y) <- keyMap[match(rownames(y),keyMap$ensembl_gene_id),]$entrezgene_id
y <- y[!is.na(rownames(y)),]

dmat <- t(y)
dannot <- as.matrix(data.frame("probe"=rownames(y),"EntrezGene.ID" = rownames(y)))
rownames(dannot) <- rownames(y)
pam50.annon <- molecular.subtyping(sbt.model = "pam50",data = dmat,annot = dannot,do.mapping = T)

rnaseq$meta$PAM50 <- pam50.annon$subtype[1:nrow(rnaseq$meta)]
```

```{r,eval=F}
fwrite(rnaseq$meta,"~/Desktop/PDX.rnaseq.char.sample_meta.csv")
```


#################################################################



#IC10 (subsampling)

## Run

```{r}
#rnaseq.pdx <- subset.PDX(rnaseq,which(rnaseq$meta[,human.library.size>10E6]))

keyMap <- data.table(getBM(
  attributes=c('hgnc_symbol','ensembl_gene_id'),
  filters = 'ensembl_gene_id', 
  values = rnaseq$human$gene.meta$Geneid, 
  mart = ensembl))

subsample.counts <- function(x,totalReads,scaling.factors=NULL){
  y <- sapply(1:ncol(x),function(i){
    y <- x[,i]
    n <- length(y)
    if(is.null(scaling.factors)) N <- totalReads
    else N <- totalReads * scaling.factors[i]
    y <- sample(1:n,N,replace=T,prob=y)
    z <- rep(0,n)
    for(i in 1:N){
      j <- y[i]
      z[j] = z[j] + 1
    }
    z
  })
  rownames(y) <- rownames(x)
  y
}

x <- cbind(rnaseq$human$data,tcga[match(rnaseq$human$gene.meta$Geneid,rownames(tcga)),])

readLimits <- seq(10,2,-2)*1E6

res.pdx <- lapply(readLimits,function(totalReads){
  
  # Subsample and then bind with TCGA
  z <- subsample.counts(x,totalReads,scaling.factors)
  z <- cbind(z,y)
  z <- z[rowSums(z)!=0,]
  
  # Normalise
  #z <- t(1E6 * t(z) / (colSums(z) * calcNormFactors(z)))
  group <- c(rep("PDX",dim(x)[2]),rep("TCGA",dim(y)[2]))
  design <- model.matrix(~ 0 + group)
  z <- voom(z,design)
  
  # Run iC10
  features <- matchFeatures(Exp=z$E,Exp.by.feat = "gene")
  features <- normalizeFeatures(features, "scale")
  res <- iC10(features)
  gof <- goodnessOfFit(res)
  
  res <- res$posterior[1:ncol(x),]
  rownames(res) <- colnames(x)
  
  gof <- gof$indiv[1:ncol(x)]
  names(gof) <- colnames(x)
  return(list("res"=res,"gof"=gof))
})
names(res.pdx) <- paste0(readLimits/1E6,".milion.reads")
```

## Results

```{r}
z <- rbindlist(lapply(lapply(res.pdx,"[[","res"), melt),idcol = "total.reads")
z <- z[,.(sample.name=Var1,total.mil.reads=as.integer(tstrsplit(total.reads,"\\.")[[1]]),iC10=Var2,iC10.prob=value)]
z$sample.name <- factor(z$sample.name,levels = sort(unique(as.vector(z$sample.name))))
z$iC10 <- factor(z$iC10)

ggplot(z) + aes(x=sample.name,y=iC10.prob,fill=iC10) + geom_col() + facet_grid(total.mil.reads~.) +
  theme_bw(15) + theme(axis.text.x = element_text(angle=-90,hjust = 0)) + xlab("") + 
  scale_fill_manual(values=c('#FF5500', '#00EE76', '#CD3278','#00C5CD', '#8B0000','#FFFF40', '#0000CD', '#FFAA00', '#EE82EE', '#7D26CD'))
```

```{r}
z <- data.table(melt(sapply(res.pdx,"[[","gof")))
z <- z[,.(sample.name=Var1,total.mil.reads=as.integer(tstrsplit(Var2,"\\.")[[1]]),gof=value)]
ggplot(z) + aes(x=total.mil.reads,y=gof,group=sample.name) + geom_line()
```


```{r}
x <- rnaseq.pdx$human
keyMap <- data.table(getBM(attributes=c('hgnc_symbol','ensembl_gene_id'),filters = 'ensembl_gene_id', values = rownames(x), mart = ensembl))
rownames(x) <- keyMap[match(rownames(x),ensembl_gene_id),hgnc_symbol]

data(Map.Exp)
y <- x[rownames(x) %in% Map.Exp$Gene_symbol,]
y <- y[rowSums(y)!=0,]

z <- rbind(
  data.table(patient=rnaseq.pdx$meta$patient,iC10=apply(res.pdx[[1]]$res,1,which.max),genes="all",pca.run(x)[,1:2]),
  data.table(patient=rnaseq.pdx$meta$patient,iC10=apply(res.pdx[[1]]$res,1,which.max),genes="subset",pca.run(y,N=nrow(y))[,1:2])
)

ggplot(z) + aes(x=PC1,y=PC2,colour=factor(iC10),label=patient) + geom_text() + theme_bw(15) + facet_wrap(~genes,scales = "free")
```
